S SwiftySW New member Oct 16, 2009 #1 Is it best to leave a ceiling projector on when not in use, for an entire lesson? I am worried about the cost of a replacement bulb over swithing the projector on a off?
Is it best to leave a ceiling projector on when not in use, for an entire lesson? I am worried about the cost of a replacement bulb over swithing the projector on a off?
